Rotary fan



UNITED STATES PATENT OFFICE.

ROBERT E. CISSEL, ELIZABETH, ASSIGNOR TO THE BAGKUS MANUFAC- TURING COMPANY, OF NEWARK, NEW JERSEY.

ROTARY FAN.

SPECIFICATION forming part of Letters Patent No. 364,751, dated June 14, 1887.

Application filed March 31, 1887. Serial No. 233,11. (No model.)

To all whom it may concern.-

. Be it known that I, ROBERT B. OIss L, of Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Rotary Fans, of which the following is a specification.

This invention relates to an improved clutch mechanism, for rotary fans of that class which are suspended from the ceiling and used for agitating the air and cooling and ventilating thereby the roomsin which the fan is arranged; and the invention consists of the combination of a rotary driving-shaft, afixed sleeve on said shaft, a fan-hub placed loosely on said sleeve, said fan-hub being longitudinally slittcd, soas to form clamping spring-sections, which gradually increase toward the lower end of the hub, and a slide-ring for clamping said sections, said slide-ring being guided by an eye or sleeve on a central guide-stem attached to a collar at the lower end of the driving-shaft;

In the accompanying drawings, Figure 1 represents a side elevation of a rotary fan with my improved clutch device, and Fig. 2 is a vertical transverse section of the clutch device drawn on a'larger scale.

Similar letters of reference indicate corresponding parts Referring to the drawings, A represents a rotary driving-shaft, which is supported in bearings of a suitable hanger-frame, (not shown in the drawings,) said hanger-framebeing suspended from the ceiling in the usual' a rotary fan, 0, said hub being fitted by its beveled upper edge to the groove 2) of the collar b, as shown in Fig. 2.

The hub O is provided,'preferably,with four longitudinal slits, (1, two of which extend from the lower edge of the hub to near the sockets of the fan-blades, while the remaining two slits 01 extend from the lower edge nearly to the four slits (Z dividethe hub into four quadrantal sections, which spring in outward direction away from the shaft A The lower part of the hub 0 increases in thickness-toward the lower end and serves to guide a correspondingly-tapered clamping-ring, D, that is fitted to the lower part of the hub O and provided with downwardly-extending arms 6, that are united at their lower end bya socket, c. The socket e is guided on a fixed center pin, 6, of the bottom collar, a, of the shaft, so that the clamping ring is prevented from wabbling when moved up and down on the lower part of the hub. The socket c is made in the shape of a button, and is taken hold of in raising the clamping-ring. When the clamping-ring D is lifted, thesections of the hub spring away from the sleeve B on the shaft so as to clear the sleeve, whereby the fan is but'slowly rotated, owing to the friction between the sleeve and hub. If, on the other hand, it is desired to rotate the fan 0 with the driving-shaft A, the clamping-ring D is pulled in downward direction, so that it forces the spring-sections of the hub tightly against'the fixed sleeve of the driving-shaft A, whereby the fan is taken along with the shaft and rotated at the same speed therewith. By guiding the lower part of the clampingring on the stem 0 of the collar a,the ring binds always equally on the circumference of the slittcd lower part of the hub, and exerts thereby an effective clamping action on the same. As the hub is confined between the fixed lower collar and the collarb at the upper end of the sleeve B, it isprevented from following the motion of the clamping-ring either in upward or downward direction.

In this manner a reliable and easily-operated 4 upper end of the hub, as shownin Fig.1. The

clutch mechanism for rotary fan-shafts is obo shaft, a sleeve attached to the lower end of the driving-shaft, a collar applied to the lower end of the sleeve and driving-shaft, a fan having a hub placed loosely on said sleeve and provided with longitudinal slits, and a clamping-ring applied to the lower slitted part of the fan-huh, substantially as set forth.

2. The combination of a rotary drivingshaft, a collar attached to the lower end of the driving-shaft and provided with a central guide-stein, a sleeve attached to the lower end of the shaft and provided with a collar at the upper end, aloose fan-hub havinglongitudinal slits and an outward taper at the lower part, and a clamping-ring applied to thelower slitted part of the hub and provided with arms and with a socket at the lower ends of the arms, said socket being guided on the stem of the lower collar, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing Witnesses.

ROBERT B. GISSEL.

\Vitnesses;

CARL KARP, SIDNEY MANN. 

